Board of Directors

National Association for Proton Therapy (NAPT) is a non-profit organization dedicated to promoting the use of proton therapy as an advanced and effective form of cancer treatment. The NAPT Board of Directors plays a pivotal role in guiding the organization’s mission, vision, and strategic direction. The board is composed of distinguished professionals from various roles within the field of proton therapy, each bringing their expertise, experience, and commitment to advancing proton therapy and supporting cancer patients.

Executive Committee

Steven Frank, MD, FASTRO

Kristin Heath, DBA, MBA, MHA

Director of Operations – Radiation Oncology,
Miami Cancer Institute, Baptist Health South Florida

Vickie Miller, RN, MN, MBA

Operations Administrator,
The Mayo Clinic – Arizona

Tom Welch

Tom Welch

Michael Butkus, PhD

Co-Medical Director/Head of Proton Physics
University of Miami

Andrew Chang, MD

Medical Director, Pediatrics
California Protons Cancer Therapy Center

Ashish K. Chawla, MD

Ashish K. Chawla, MD

Chairman Proton Therapy
Inova Schar Cancer Institute

Isabelle Choi, MD, FACRO

Director of Research
New York Proton Center

James Gray, MD

James Gray, MD

Medical Director
Tennessee Oncology Proton Center

Steven Holan, MBA

Vice President, Operations
Baptist Health South Florida

Yoly Magana, RN, MBA

Yoly Magana, RN, MBA

Director, Clinical Operations
Loma Linda James Slater Proton Center

Mark McDonald, MD

Mark McDonald, MD

Medical Director
Emory Proton Therapy Center

Fern Nibauer-Cohen

Director, Patient Engagement & Development
Penn Medicine

Elizabeth Nichols, MD

Elizabeth Nichols, MD

Associate Professor
Maryland Proton Treatment Center

MaryBeth Sullivan

Executive Director
Hampton Proton Therapy Institute

Charles Yoo

Charles Yoo

Vice President of Operations & Finance
South Florida Proton Therapy Institute

Board Advisors

Leonard Arzt

Board Member, Emeritus / Founder
National Association for Proton Therapy

Jeffrey Bradley, MD

Professor of Radiation Oncology
University of Penn

Jason Caron, JD

Partner, Healthcare & Life Sciences Practice Group
Latham & Watkins LLP

Minesh Mehta, MD

Deputy Director – Chair, Radiation Oncology
Miami Cancer Institute, Baptist Health South Florida


Jennifer Maggiore, LCSW

Executive Director

Sarah Galen

Director of Education

Michael Barron

Policy & Research Associate 

Jaime Hamilton

Program Manager